refactored data-types to reduce plugin sizes

operator-builtin.go

@@ -9,6 +9,7 @@ import (
 
 	"git.portale-stac.it/go-pkg/expr/kern"
 	"git.portale-stac.it/go-pkg/expr/scan"
+	"git.portale-stac.it/go-pkg/expr/types/str"
 )
 
 //-------- builtin term
@@ -31,7 +32,7 @@ func evalBuiltin(ctx kern.ExprContext, opTerm *scan.Term) (v any, err error) {
 	}
 
 	count := 0
-	if kern.IsString(childValue) {
+	if str.IsString(childValue) {
 		module, _ := childValue.(string)
 		count, err = ImportInContextByGlobPattern(ctx, module)
 	} else {